<script setup lang="ts">
import { createRoleAPI, getRoleDetailAPI, getTreeAPI, updateRoleAPI } from '@/apis/system';
import type { RoleData, RoleParams } from '@/types/system';
import { ElMessage, type FormInstance, type FormRules } from 'element-plus';
import type { TreeInstance } from 'element-plus/lib/components/index.js';
import { ref } from 'vue';
import { useRoute, useRouter } from 'vue-router';

const activeIndex = ref(1)

const roleForm = ref<RoleParams>({
  roleName: '',
  remark: '',
  perms: []
})
const roleFormRef = ref<FormInstance>()
const roleFormRules = ref<FormRules<RoleParams>>({
  roleName: [
    { required: true, message: '请输入角色名称', trigger: 'blur' },
    { min: 2, max: 20, message: '长度在 2 到 20 个字符', trigger: 'blur' }
  ],
  remark: [
    { required: true, message: '请输入角色描述', trigger: 'blur' },
  ]
})

const onPrev = () => {
  activeIndex.value --
}

// 获取权限列表(所有树形)
const treeList = ref<RoleData[]>([])
const getTreeList = async () => {
  const res = await getTreeAPI()
  treeList.value = res.data
}
getTreeList()

const treeRefs = ref<TreeInstance[]>([])
// 被禁用选择的树形组件(表单3)
const diabledTreeRefs = ref<TreeInstance[]>([])


const onNext = async () => {
  try {
    if (activeIndex.value === 1) {
      await roleFormRef.value?.validate()
      activeIndex.value++
    } else if (activeIndex.value === 2) {
      roleForm.value.perms = []
      treeRefs.value.forEach(tree => {
        const res = tree.getCheckedKeys() as number[]
        // console.log('tree的选中权限', res)
        roleForm.value.perms.push(res)
      })
    if (roleForm.value.perms.flat().length === 0) {
      ElMessage.error('请至少勾选一项权限')
    } else {
      // 选中校验没问题,进入下一步(进入表单3)
      activeIndex.value++
      // 进入表单3后,把选中的权限,同步到被禁用的树形组件
      diabledTreeRefs.value.forEach((tree, index) => {
        tree.setCheckedKeys(roleForm.value.perms[index])
      })
    }
    }
  } catch {
  }
}


const route = useRoute()
// 编辑角色-要求回显
const getRoleDetail = async () => {
  if (route.params.id) {
    const res = await getRoleDetailAPI(Number(route.params.id))
    const { roleName, remark, perms } = res.data
    roleForm.value = { roleName, remark, perms }
  }
  
}
getRoleDetail()

const router = useRouter()
const onSubmit = async () => {
  const roleId = route.params.id
  if (roleId) {
    await updateRoleAPI({
      roleId: Number(roleId),
      ...roleForm.value
    })
  } else {
    await createRoleAPI(roleForm.value)
  }
  ElMessage.success(roleId ? '更新成功' : '添加成功')
  router.back()
}

</script>

<template>
  <div class="add-role">
    <header class="add-header">
      <el-page-header content="添加角色" @back="$router.back()" />
    </header>
    <main class="add-main">
      <div class="step-container">
        <el-steps direction="vertical" :active="activeIndex">
          <el-step title="角色信息" />
          <el-step title="权限信息" />
          <el-step title="检查并完成" />
        </el-steps>
      </div>
      <div class="form-container" v-show="activeIndex === 1">
        <div class="title">角色信息</div>
        <div class="form">
          <el-form ref="roleFormRef" class="form-box" :model="roleForm" :rules="roleFormRules">
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="roleForm.roleName" />
            </el-form-item>
            <el-form-item label="角色描述" prop="remark">
              <el-input v-model="roleForm.remark" type="textarea"/>
            </el-form-item>
          </el-form>
        </div>
      </div>
      <div class="form-container" v-show="activeIndex === 2">
        <div class="title">权限配置</div>
        <div class="form">
          <div class="tree-wrapper">
            <div v-for="(item,index) in treeList" :key="item.id" class="tree-item">
              <div class="tree-title">{{ item.title }}</div>
              <el-tree 
              :data="item.children"
              show-checkbox
              node-key="id"
               ref="treeRefs"
              default-expand-all
              :default-checked-keys="roleForm.perms[index]"
              :props="{ label:'title' }"
              >
              </el-tree>
            </div>
          </div>
        </div>
      </div>
      <div class="form-container" v-show="activeIndex === 3">
        <div class="title">检查并完成</div>
        <div class="form">
          <div class="form-item">角色名称:{{ roleForm.roleName }}</div>
          <div class="form-item">角色名称:{{ roleForm.remark }}</div>
          <div class="form-item">角色权限:</div>
          <div class="tree-wrapper">
            <div v-for="item in treeList" :key="item.id" class="tree-item">
                <div class="tree-title">{{ item.title }}</div>
                <el-tree
                  :data="item.children"
                  show-checkbox
                  default-expand-all
                  node-key="id"
                  :props="{ label: 'title', disabled: () => true }"
                  ref="diabledTreeRefs"
                />
              </div>
          </div>
        </div>   
      </div> 
    </main>
    <footer class="add-footer">
      <div class="btn-container">
        <el-button @click="onPrev()" v-if="activeIndex > 1">上一步</el-button>
        <el-button type="primary" @click="onNext()" v-if="activeIndex < 3">下一步</el-button>
        <el-button type="primary" v-if="activeIndex === 3" @click="onSubmit()">{{ $route.params.id ? '确认更新' : '确认添加' }}</el-button>
        {{ roleForm }}
      </div>
    </footer>
  </div>
</template>


<style scoped lang="scss">
.add-role {
  background-color: #f4f6f8;
  height: 100vh;

  .add-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 64px;
    line-height: 64px;
    font-size: 16px;
    font-weight: bold;
    background-color: #fff;

    .left {
      span {
        margin-right: 4px;
      }

      .arrow {
        cursor: pointer;
      }
    }

    .right {
      text-align: right;
    }
  }

  .add-main {
    position: fixed;
    top: 64px;
    bottom: 88px;
    width: 100%;
    overflow-y: auto;
    background: #f4f6f8;
    padding: 20px 30px;
    display: flex;

    .step-container {
      height: 400px;
      width: 200px;
    }

    .form-container {
      flex: 1;
      background-color: #fff;
      overflow-y: auto;

      .title {
        height: 60px;
        line-height: 60px;
        padding-left: 20px;
      }

      .form {
        margin-bottom: 20px;
        padding: 20px 65px 24px;

        .el-form {
          display: flex;
          flex-wrap: wrap;
        }

        .info {
          font-size: 14px;
          color: #666;

          .form-item {
            margin-bottom: 20px;
          }
        }
      }

      .form-box {
        width: 600px;
        display: flex;
        flex-direction: column;
      }
    }
  }

  .add-footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    padding: 24px 50px;
    color: #000000d9;
    font-size: 14px;
    background: #fff;
    text-align: center;
    z-index: 10001;
  }

  .tree-wrapper {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;

    .tree-item {
      flex: 1;
      padding: 0px 4px;
      text-align: center;

      .tree-title {
        background: #f5f7fa;
        text-align: center;
        padding: 10px 0;
        margin-bottom: 12px;
      }
    }
  }
}
</style>